"ASPCA". ASPCA: Five Freedoms. American Society for the Prevention of Cruelty to Animals (ASPCA). Archived from the original on 6 October 2015. Retrieved 2 October 2015.
fawc.org.uk
"Five Freedoms". Farm Animal Welfare Council / Farm Animal Welfare Committee. Archived from the original on 2012-10-07.
"ASPCA". ASPCA: Five Freedoms. American Society for the Prevention of Cruelty to Animals (ASPCA). Archived from the original on 6 October 2015. Retrieved 2 October 2015.